Uses you right here and right now. (Finishes what she started)

With great strength, Eris lifts you off of the floor and brings your face up to hers. Her sultry gaze puts you off guard as she throws you up and catches you by your thighs. You put your arms around her neck for balance, but you accidentally end up getting a bit too close to her face and giving her a smooch. Both your and her eyes go wide, but while your face keeps an expression of fear and worry, Eris's turns into a big evil grin. Suddenly, she quickly lowers your butt and you feel the hard tip of her cock poke at your already stretched out asshole. As she drops you onto her dick, penetrating you, you yelp out and break the impromptu kiss with Eris. You feel the entirety of her 17-inch long shaft slide deep inside your rectum once again, only this time, there's no escaping it. You shake your legs and let out a long moan but to no avail. Your eyes water up as the monstrous schlong digs its way up your anus, putting immense pressure on your prostate.

After dropping you on her shaft, Eris quickly moves your body back up her length about halfway before dropping it down again. The first few times it stings bad, but just about a dozen thrusts later, your ass starts getting used to the punishment. Your pained moans start turning more lustful as your prostate gets stimulated by Eris's sizable cock. Eris senses your enthusiasm and starts moving you up and down her dick even faster and harder, letting you fall free on her erection before quickly propping you back up. You start moaning louder while Eris starts grunting louder as well, as you enjoy the painful but amazing experience of being fucked.

After a while of ball slapping sex, Eris's lust overwhelms her ability to fuck you in your current position. She picks you up by your hips so she can bang you even faster. Your legs instantly wrap around her waist for balance, which just brings you two closer together. While Eris continues pushing the limits of your anus, you press your body close to hers, feeling her breasts push up against your chest. Her nipples are hard and you feel a coat of sweat on her skin. Taking in all of the anal sex you've received, you're pretty sweaty yourself. You keep a tight grip around Eris as she quickly gains pace in pounding your hole. Your own cock is rock hard and sticks through your ripped uniform, rubbing against her toned stomach. The joined pleasure of that, plus your prostate being whacked by her cock will have you cumming in no time. You start moaning again as her dong digs inside of your butt even faster than before.

Minutes pass and your body slowly turns into a living fucktoy as Eris dominates your ass. Your entire bottom half goes numb and your legs go limp as you get delivered non-stop cock action from Eris. Your arms hang freely behind her back and your head rests on her shoulder as you give yourself up to her. After an hour-long anal session, you finally start feeling signs of her orgasm rearing its head. Her grip on your hips suddenly tightens and her breathing becomes a lot heavier. Eris starts pushing you forcefully on her cock, even though your ass offers close to no resistance after being used for so long. She lets out a series of grunts growing in intensity until finally letting out a loud yell of orgasm.

Eris pushes you hard against her crotch as her cock goes as deep as it can in your rectum. You feel her nails dig into your skin, leaving red marks as she holds you tight, making sure you can't escape from her as she's about to fill you up. With a slight buck of her hips, Eris's dick pulses and lets out a thick load of semen straight up your ass. You quickly feel her hot cum filling up your insides, shot after shot. The slimy substance starts leaking out from your twitching sphincter, flowing around Eris's cock. In the middle of her orgasm, Eris's legs give out, making her fall to the floor. She lands on her back, but you fall right back on her cock and take in the rest of her loads. The sudden drop effect sends you over the edge of orgasm as well, making you moan out loud as your dick blasts a load of hot jizz all over her chest and face.

Once you're done being pumped full of Eris's cum, you try to rest, but the 17-inch rod inside of you makes that a bit difficult. You try to pick yourself up from the cowgirl style position you've put yourself in, but since your legs are weak, all you manage is to roll off of her, landing beside her. Your ass feels a lot emptier without Eris's cock plugging it, but her cum keeps you company. Her seed instantly starts flowing outside of your ass. You lay on the floor for a solid minute, collecting your thoughts and giving your body some time to recuperate.

After you feel rested enough, you get up on your feet, still feeling the effects of Eris's intrusion.

The speakers quickly turn on and through them speaks Alan from the research team. "Damn boy, your ass knocked her out cold. Let's just hope she doesn't wake up soon, or else this test will have to drag on a bit. Nevertheless, great session! Still not sure what to do with Eris, but I guess we'll keep her around just for a little longer. Anyway, your job's done! Head on back to your room and pick up another test."

You march back over to your room and shoot one last glance at Eris. You can hear her snoring from the other side of the testing room and you notice the large puddle of cum besides her. You close your room door and take a little rest before getting back to business.

You got the "Wild ride" ending with Eris.